Electrical converter



(No Model.) 2 Sheets-8heet 1.

A. SGHMID.

ELECTRICAL CONVERTER.

No. 366,347. PatentedJulylZ, 1887'.

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'(No Model.) I A SGHMID 2 Sheets-Sheet 2.

ELECTRICAL CONVERTER. No. 366,347. Patented July 12, 1887.

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ALBERT SCHMID, OF ALLEGHENY, ASSIGNOR TO GEORGE WESTINGHOUSE,

I JR, OF PITTSBURG, PENNSYLVANIA.

ELECTRICAL CONVERTER.

SPECIFICATION forming part of Letters Patent. No. 366,347, dated July 12, 1887.

Application tiled December 27, 1:86. Serial No. 222,535. (No model.)

To all whom it may concern:

Be it known that I, ALBERT ScrIMID, a citizen of the Republic of Switzerland, residing in Allegheny, in the county of Allegheny and 5 ,State of Pennsylvania, have invented certain new and useful'Iinprovements in Electrical Converters, of which the following is a specification.

The invention relates to the construction to of induction-coils or electric converters.

It has been the practice to employ electric converters for transforming electric currents of any given quantity and electro-motive force into currents in which these factors are varied.

1 These converters consist of coresof soft iron, wound with two or more coils of insulated wire, termed the primary and secondary coils. These coils may be variously proportioned with reference to each other to produce the required changes in the conditions or factors of the current. The best practical results would seem to be secured when the wire is very largely surrounded by soft iron. \Vhen a considerable mass of soft iron is applied, it

2 is also desirable that it be capable of rapid magnetic charge and discharge. This result is best attained by forming the core of thin plates or sheets of soft iron.

The object of this invention is therefore to provide a converter having its core formed of thin plates, each plate surrounding both sides of the'coils.

In the accompanying drawings, Figure 1 is an end View, partly in section, and Fig. 2 is a plan, partly in section, of a converter embodying the features of the invention. Fig. 3

illustrates the method of applying the coreplates to the coils.

Referring to the figures, A represents the 4c core of a converter, and G and O are respectare themselves preferably rcctangularin form, 5L I and they are of such size as to receive the primary and secondary coils O and 0 Each opening 0' and e is cut open, as shown at f and f", respectively, the cutsbeing preferably in a line with the inner edges of the corresponding openings. It may not always be found necessary to have the cuts exactly in line with these edges; but one or both of them may be in a diagonal direction, as indicated by the dotted lines, Fig. 3. This has the advantage of sharpening the tongue f and making it more easy to insert it in the coils.

The central tongue, f, is designed to extend through the interior of the coils. The separate plates are then applied to the coils by 55 springing the portions f and f* backward, in the manner shown in Fig. 3, then thrusting the tongue f through the coils and allowing the plate to return to its normal position. The iron which it is found preferable to use is so thin that the operation may be very readily performed byhand without the use of machinery.

For the purpose of breaking joints, the alternate plates a a are preferably inserted from opposite sides, so that the slits ff of one 5 plate are against the solid portions of the two adjacent plates. It is preferred to place the plates so that the bare metallic surfaces of two plates rest against each other, and the opposite insulated surfaces of these plates rest against corresponding insulated surfaces of their contiguous plates. The insulated surfaces may, however, all lie in one direction.

- In building the converter, the plates are temporarily pressed together, as may be found necessary, by clamps or in any convenient manner. The platcs, when as many as practicable have been inserted, should be tightly pressed against each other, and to accomplish this, two plates, H and H are placed at the 0 respective ends of the converter and bound against the same by four bolts, h, h, hfland h. The plates 11 and H are preferably of cast brass or iron, surrounding the projecting ends of the coils and resting against the edges of 5 the end plates, a a. To render the completed converter as compact as possible, the corners of the plates a a are cut off to allow room for the bolts h h h h. The iron thus removed is oflittle or no importance as regards the operation of the converter.

I claim as my invention 1. The combination of the primary and secondary coils of a converter and a core composed of thin flexible-plates of soft iron, each formed with two holes, the metal about each hole being cut open for receiving the coils, substantially as described.

2. Metal plates for forming cores for electric converters, constructed with two openings,the metal around each opening being cut apart.

3. A core-plate for electrical converters, consisting of a thin sheet of soft iron having two holes for receiving the respective sides of the coils and a cut from each openingto the outside of the sheet.

4. A core-plate for electrical converters, consisting of a sheet of soft iron having two rectangular holes stamped therein and an opening from each hole approximately in line with the inner edge of the same.

5. A core-plate for electrical converters, consisting of an oblong plate having two openings, the metal about each opening being cut through, substantially as described.

6. An electrical converter consisting of the primary and secondary coils and a series of soft-iron plates having holes for receiving the respect ive sides of the c0ils,the metal surrounding the holes being cut apart upon opposite sides in the alternate plates.

7. An electrical converter consisting of primary and secondary coils having a core composed of thin plates of soft iron, each plate having two holes, the metal about each hole being cut open for receiving the coils,and nonmagnetic material between alternate plates.

8. A core for electric converters, consisting of thin plates of soft iron, each having two openings, and each two plates being magnetically separated from the adjacent plates, but in magnetic contact witheach other.

9. An electric converter consisting of primary and secondary coils and a core of softiron plates, each constructed with two openings for receiving the coils, the metal about each opening being cut through and the central tongues thus formed inserted within said coils from opposite sides, and sheets of nonmagnetic material between the alternateplatcs.

In testimony whereof I have hereunto subscribed nny namethis 7th day of October, A. D. 1886.

A LBERT SGHMID.

\Vitnesses:

CHARLES A. TERRY, OLIVER B. SHA LLENRERGER. 

